<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../react18/react.development.js"></script>
  <script src="../react18/react-dom.development.js"></script>
  <script src="../react18/babel.min.js"></script>
  <script src="../react18/prop-types.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    /* 
      通过ref方式收集表单数据
    
    */
   class App extends React.Component{
    render(){
      return (
        <div>
        姓名：<input type="text" ref={cl => this.name = cl}/>
        <br/>
        年纪：<input type="text" ref={cl => this.age = cl}/>
        <br/>
        爱好：<input type="text" ref={cl => this.hobby = cl}/>
        <br/>
        <button onClick={this.handle}>提交</button>
        </div>
      )
    }
    handle = () =>{
      const name = this.name.value
      const age = this.age.value
      const hobby = this.hobby.value
      console.log(name,age,hobby);
    }
   }
   ReactDOM.createRoot(document.getElementById('app')).render(<App/>)
  //  class App extends React.Component{
  //   render(){
  //     return (
  //       <div>
  //         姓名：<input type="text" ref={cl => this.name = cl}/>
  //         <br/> 
  //         年纪：<input type="text" ref={cl => this.age = cl}/>
  //         <br/>
  //         爱好：<input type="text" ref={cl => this.hobby = cl}/>
  //         <br/> 
  //         <button onClick={this.change}>提交</button>
  //       </div>
  //     )
  //   }
  //   change = ()=>{
  //     const name = this.name.value
  //     const age = this.age.value
  //     const hobby = this.hobby.value
  //     console.log(name,age,hobby);
  //   }
  //  }
  //  ReactDOM.createRoot(document.getElementById('app')).render(<App/>)
    // class App extends React.Component{
    //     render(){
    //       return (
    //         <div>
    //           姓名: <input type="text" ref={c => this.nameEle = c}/>
    //           <br/>
    //           年龄: <input type="text" ref={c => this.ageEle = c}/>
    //           <br/>
    //           爱好: <input type="text" ref={c => this.hobbyEle = c}/>  
    //           <br/>
    //           <button onClick={this.handle}>提交</button>  
    //         </div>
    //       )
    //     }

    //     handle = () => {
    //       const name = this.nameEle.value;
    //       const age = this.ageEle.value;
    //       const hobby = this.hobbyEle.value;
    //       console.log(name,age,hobby);
    //     }
    // }

    

    // const root = ReactDOM.createRoot(document.getElementById('app'));
    // root.render(<App/>)

  </script>
</body>

</html>